Tick... tock.. tick... tock...
“I thought I might find you here.”
“Visiting old friends? It’s the least I owe them, after so long...”
Tick... tock... tick... tock...
“I suppose so.”
“And it has not been easy, so far, making new ones...”
Tick... tock... tick... tock...
“Persistence will pay off.”
“I hope you are right.”
Click... whirr...
The sound of a chiming bell interrupts any further conversation.
A minute passes.
“...we’re not getting any younger, are we.”
“You are only as old as you feel, my dear.”
“...right.” It’s said with a smile, as though a long-forgotten truth was once more remembered.
“Thank you.”
Luna and Celestia? Luna would've lost all her old friends except for Celestia, which can make it harder to make new ones since your friends can't help you expand your circle. I've had that trouble myself moving around between states.
probably the best guess
And how old do Luna and Tia feel? They're not really getting any older, either, in some senses at least. Even if I'm sure they feel all thousand-plus years in other ways.